Dennis thanx for the very informative reply regarding the Vocalizer....Yamaha has seemed to use the same old one over and over in their Tyros & Psr lines ....I use them but you really have to be experienced in setting it up & mostly singing thru then the correct way besides activating them in a style that a real back up singer harmonies would be used in songs which is an art in itself for sure, But when done correctly its "Magic"...I've also used the Digitech & TC Helicon units & you can definitly hear the difference.....although more recently the Roland Vocalizer on my G70 or on My D5 is superb also with ease of use many variations and stellar harmonies with minimum vocal efforts. I get a few mixed reviews from many on the PA800 & Im dossed on a final decision to even bother demoing one at this time .....although Im an old Korg player from the 70's & Ive owned and performed with the Korg "Personal" Kb (circa 1970)thru the i3,i30,Pa60,Pa80......we'll see...

Take Care

donny